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CallExternalMethodActivity.CorrelationToken Property

Gets or sets the CorrelationToken for the external method.

Namespace:  System.Workflow.Activities
Assembly:  System.Workflow.Activities (in System.Workflow.Activities.dll)

public virtual CorrelationToken CorrelationToken { get; set; }

Property Value

Type: System.Workflow.Runtime.CorrelationToken
The correlation token for the external method.

This property defines which specific CallExternalMethodActivity activity a given external method call comes from. This value can then be used in the payload of a local communication service event to direct that event to the correct HandleExternalEventActivity activity.

For an example of correlation, see the Correlated Local Service Sample.

The following sample shows how to access the CorrelationToken property of a CallExternalMethodActivity object. This sample is from the Correlated Local Service SDK sample, from the CorrelatedLocalServiceWorkflow.designer.cs file. For more information, see Correlated Local Service Sample.

this.createTask2.CorrelationToken = correlationtoken1;

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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